I don't often post on these forums as I find them depressing. I have had fibro diagnosed for 5 years now and lost my job at guess where? Yes the DWP!
It's a long story but I got help from the Benefits and Work site which you have to pay a small yearly fee of £20 a year to get access to all their guides but it is well worth it. It is ran by ex-benefit workers, some very high level and they know what they are talking about and keep abreast of all changes, like next years looming PIP payments to replace DLA.
I recently had to change from Incapacity to ESA and like almost everyone else was initially put in the work group. With out going into all my personal problems I would suggest you read the guides with someone to help you who can talk on your behalf and let them have 3rd party rights. It will help and you won't get as confused and frustrated if someone else can keep a clear head for you, relay what is said, help to explain and fill in those awful forms. My sister did it for me.
I asked for a reconsideration and a very nice assessor from the DWP rang my sister, and then spoke to me, and after only 15 minutes of answering his questions honestly, he agreed I should be in the support group. Blessed relief.
As I said the DWP are human beings doing an extremely difficult job and yes there are those who are mini Hitler's but most are under terrible job pressures and will help you within the written rules they have to abide by.
I hope as an ex DWP employee this gives you a different perspective and my one big tip - be honest. If they discover through any means an untruth, you will be highlighted as a risk. Never say anything you cannot back up with evidence from a GP or Specialist. Make sure you keep ever letter from Dr's etc, and what the DWP have sent to you. Always keep the names and times of whoever you spoke too and what was said.
Yes I can hear you saying - it is a lot for someone, however intelligent or resourceful, to do when you have Fibro or any other chronic condition - so get 3rd party help. It doesn't have to be a family member - but it does have to be someone you can trust with a reasonable degree of literacy and communication skills. CAB offer this service but most are swamped. There are other charities that do this and support groups but the best place for advice is the website I mentioned, Benefit and Work.co.uk. Its £20 a year I think now, and worth every penny. If you need any more advice that is the place to go to do with anything concerning benefits. I hope this helps and sorry it was a big read, it took me ages to type it! Hugs. Stephanie.